Causes a store to add the specified flag
to the
flags set for the messages in the specified
sequence
.
imap_stream
An IMAP stream returned by imap_open().
sequence
A sequence of message numbers. You can enumerate desired messages with the X,Y syntax, or retrieve all messages within an interval with the X:Y syntax
flag
The flags which you can set are \\Seen, \\Answered, \\Flagged, \\Deleted, and \\Draft as defined by RFC2060.
options
A bit mask that may contain the single option:
ST_UID - The sequence argument contains UIDs instead of sequence numbers